Isso – Ich schrei sonst – is a lightweight commenting server written in Python and JavaScript. It aims to be a drop-in replacement for Disqus.

Prepack is a tool that optimizes JavaScript source code: Computations that can be done at compile-time instead of run-time get eliminated. Prepack replaces the global code of a JavaScript bundle with equivalent code that is a simple sequence of assignments. This gets rid of most intermediate computations and object allocations.

Postal is a complete and fully featured mail server for use by websites & web servers. Think Sendgrid, Mailgun or Postmark but open source and ready for you to run on your own servers.

A lightweight, open source, tracking-free comment engine alternative to Disqus.

Machine Learning in Python

Simple and efficient tools for data mining and data analysis
Accessible to everybody, and reusable in various contexts
Built on NumPy, SciPy, and matplotlib
Open source, commercially usable - BSD license

Open source machine learning tools for developers and product teams to expand bots beyond answering simple questions.

Rasa Core's primary purpose is to help you build contextual, layered conversations with lots of back-and-forth. To have a real conversation, you need to have some memory and build on things that were said earlier. Rasa Core lets you do that in a scalable way.

RASA NLU is an open-source tool for intent classification and entity extraction. You can think of it as a set of high level APIs for building your own language parser using existing NLP and ML libraries.

Botpress is an open-source bot creation tool written in Javascript. It is powered by a rich set of open-source modules built by the community. We like to say that Botpress is like the Wordpress of Chatbots; anyone can create and reuse other people's modules.

Riot allows teams to communicate across a wide range of collaboration apps. If some team members use Riot while others use IRC, Slack or Gitter, Riot will allow these team members to seamlessly work together. Riot offers the richest network of communication bridges. Riot lets you run your own server, and provides users and teams with the most advanced crypto ratchet technology available today for a decentralized secure Internet. Riot is entirely open source: all the code is published on GitHub (Apache License) for anyone to see and extend. This means teams can customize or contribute to the code and everyone can benefit from the speed of community innovation. Riot is built on top of Matrix.

Grafana provides a powerful and elegant way to create, explore, and share dashboards and data with your team and the world.

Grafana is most commonly used for visualizing time series data for Internet infrastructure and application analytics but many use it in other domains including industrial sensors, home automation, weather, and process control.

Open source continuous delivery server to model and visualize complex workflows with ease. Automate and streamline your build-test-release cycle for reliable, continuous delivery of your product.

Passbolt is a free and open source password manager that allows team members to store and share credentials securely. Passbolt is free, open source and respectful of your privacy. It is also extensible thanks to its restful API. It's based on OpenPGP and has a Firefox extension.

Roots helps you build better WordPress sites faster.
Open-source tools for WordPress application development.

• LEMP stack
• Project boilerplate
• Starter theme

Mailtrain is a self hosted newsletter application built on Node.js (v5+) and MySQL (v5.5+ or MariaDB). Mailtrain supports subscriber list management, list segmentation, custom fields, email templates, large CSV list import files, etc.

Portia is a tool that allows you to visually scrape websites without any programming knowledge required. With Portia you can annotate a web page to identify the data you wish to extract, and Portia will understand based on these annotations how to scrape data from similar pages.

Rancher is open source software that makes it simple for organizations to deploy a private container service and deliver Docker orchestration to users. Within a team, authorized users are able to create resource pools from any hosts, and then launch containers or application templates from Rancher’s UI or CLI. Users have complete control over how their applications are deployed, and Rancher provides all of the necessary infrastructure services such as networking, load balancing, and storage to ensure the application runs brilliantly on any infrastructure.

Matrix is an open standard for decentralised communication, providing simple HTTP APIs and open source reference implementations for securely distributing and persisting JSON over an open federation of servers.

Kinto is a lightweight JSON storage service with synchronisation and sharing abilities.

Mattermost is a self-hosted solution for bringing all your team communication to one place, and making it searchable and accessible anywhere

N1 is an open-source mail client built on the modern web with Electron, React, and Flux. It is designed to be extensible, so it's easy to create new experiences and workflows around email. N1 is built on the Nylas Sync Engine which is also open source free software.

Powerful slack-like open source group chat